What was found
AIRCRAFT WAS GROUNDED: FA 1 REPORTS STRONG MUSTY SOCK ORDER IN CABIN DESCENDING THROUGH 1000". MAINTENANCE FOUND BRAKE ACCUMULATOR LEAKING HYDRAULIC FLUID AND INGESTED BY APU. MAINTENANCE FOUND LINE FROM BRAKE MANIFOLD TO AUTO BRAKE SELECTOR VALVE LEAKING, TIGHTEN LINE PER AMM 32-44-17, REF NR 7200497.